Frontline is imported in Argentina, you can read it on the very link you posted above. I haven't a box at home at the moment, I remember it was made somewhere in South America, anyway (Brazil?).
As for the dog version, I think your friend is confusing Merial's Frontline (fipronil and (S)-methoprene)[background=rgb(252, 252, 252)] [/background]with Bayer's Advantix (IMIDACLOPRID and PERMETRINE) which is lethal for cats and shouldn't even be used on a dog if there is a cat in the household.
For Frontline, you can read the cats and dogs' formulas on the box - they are exactly the same (as you can see for the kitten/adult cat versions). When I was actively treating 9 cats, my vet suggested to buy the dog's version, instead.
That's just for the record, I can see how hard is it with people not wanting buying from the Internet.